ASoC: SOF: Intel: hda: simplify and reduce indentation for hda_sdw_machine_select()

Simplify code to return when no links are enabled. No functional
change, just code cleanup before updates.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20240426153902.39560-4-pierre-louis.bossart@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>